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[RECOVERY][MT6735] TWRP-3.0.2 for Lenovo Tab3 7 (TB3-730X)

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By 0xAF, Senior Member on 25th September 2016, 02:20 PM
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Code:
#include 
/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired. Please
* do some research if you have any concerns about features included in this Recovery
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/


Team Win Recovery Project 3.x, or twrp3 for short, is a custom recovery built with ease of use and customization in mind. Its a fully touch driven user interface no more volume rocker or power buttons to mash. The GUI is also fully XML driven and completely theme-able. You can change just about every aspect of the look and feel.
[/CENTER]

Credits:
- TWRP Team

Device: Lenovo Tab3 7 Tablet - TB3-730X
Do not flash this on TB3-730F. The F model has different chipset and this recovery will softbrick it.
@sun_dream reported that 730F is working. So you can probably flash it, but be prepared with OFW, in case something goes wrong.

Instructions:
IMPORTANT: read all instructions at least once, before starting.
Note: If you're are a newbie, you can read more detailed instructions by honzazkrumlova here
- Download from link below.
- Enable "USB debugging" from developer options.
- Enable "OEM Unlocking" from developer options.
- Reboot device in Fastboot Mode (Bootloader mode), either with "adb reboot bootloader" or with VolDown+Power, to enter Recovery mode and then select "Reboot into bootloader"
- Unlock the bootloader with "fastboot flashing unlock" or "fastboot oem unlock" and follow the instructions on the tablet. (WARNING: This will erase all your data - Factory Reset)
- Once unlocked, you can use "fastboot boot TWRP_3.0.2_Lenovo_TB3-730X_Android-6.0_recovery.img" to start TWRP.
- When TWRP ask to modify system partition, answer "NO". Otherwise you will soft-brick your device and you will have to flash the original firmware and start from the beginning.
- If you want root - flash SuperSU, or as the user @Kellicros reported, you can flash Magisk 11.1.
- If you want XPosed, get it here.
- If you want to permanently flash the recovery, use "fastboot flash recovery TWRP_3.0.2_Lenovo_TB3-730X_Android-6.0_recovery.img".
- If you use it on any other Lenovo Tab3 7 device, please post the model.
- Thanks is always welcome.

Downloads:
TWRP_3.0.2_Lenovo_TB3-730X_Android-6.0_recovery.zip (well tested, consider it stable)
TWRP_3.1.1_Lenovo_TB3-730X_Android-6.0_recovery.zip

Unbrick your device:
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3rd October 2016, 06:23 PM |#2  
beldy's Avatar
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Hello
I have the same tablet (TB3-730X) and I tried this recovery, but something I did wrong.
Recovery by my works without problems, but now I can no longer boot into the system, I probably deleted it ...
After restarting the tablet always I return to Recovery and you can not flash the firmware because they can not find a version of the 730X (MTK MT8735P)
Can I use the firmware version for TB3-710 or 730F (MTK MT8161P)

Thanks for any advice, and thanks for Recovery.)
3rd October 2016, 06:37 PM |#3  
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Quote:
Originally Posted by beldy

Hello
I have the same tablet (TB3-730X) and I tried this recovery, but something I did wrong.
Recovery by my works without problems, but now I can no longer boot into the system, I probably deleted it ...
After restarting the tablet always I return to Recovery and you can not flash the firmware because they can not find a version of the 730X (MTK MT8735P)
Can I use the firmware version for TB3-710 or 730F (MTK MT8161P)

Thanks for any advice, and thanks for Recovery.)

Hi.
When TWRP is started for the first time, it asks to modify the system partition.
I answered NO, NEVER. I saw some posts about other MTK devices and other people seems to have problems like yours when TWRP modify the system partition.
Is this your case?
If yes, then you need to download the original firmware and flash it on the device. After that you need to flash the recovery again.
I've downloaded the original firmware from Russian forum (this post: http://4pda.ru/forum/index.php?showt...#entry52434543). Here is direct link: https://cloud.mail.ru/public/Fjd9/u7e8mUbhq )
This is the last TB3-730X firmware. Do not try 710 firmwares, they should not work and it is probably dangerous to flash it. I dont know for 730F, this one could work, but anyway, download the the 730X firmware from the link above.
I guess you will need the SPFlash Tool to flash the firmware.

Hope this helps.
3rd October 2016, 06:53 PM |#4  
beldy's Avatar
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Thank you for the link ...
so probably it is my case that TWRP modify the system partition ... try this firmware and send the result ..
Thanks again for your help, I appreciate it.
3rd October 2016, 09:54 PM |#5  
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I can confirm that Tab3 730x is checking if even TWRP is running (fastboot boot twrp.bin) and delete/modify system partition. TWRP not ask for modify system partition after first boot. Tablet stay on Lenovo logo forever. My firmware version is TB3-730X_S030_160509_ROW. Also in my model is not possible to read/write flash by FlashTool. I always get error 0x7D4, no matter what version I use, even after unlock bootloader. I have also try descibed firmware TB3-730X_S033_160707_ROW but this one cannot be flashed in fastboot mode. It says wrong binary (all files have in name _signed so probably different structure). It's seems that Polish Tab3 tb3-730X tablets are better protected than Russian.
0xAF can You post link to FlashTool what you used to flash your tablet?

[EDIT]
This time i get it working 0xAF are you mean first screen when TWRP start and there is swipe button? I Always swipe and this killed system partition I think. Btw do you both can flash this tablet with FlashTool?
4th October 2016, 11:00 AM |#6  
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Quote:
Originally Posted by DonKapselo

I can confirm that Tab3 730x is checking if even TWRP is running (fastboot boot twrp.bin) and delete/modify system partition. TWRP not ask for modify system partition after first boot. Tablet stay on Lenovo logo forever. My firmware version is TB3-730X_S030_160509_ROW. Also in my model is not possible to read/write flash by FlashTool. I always get error 0x7D4, no matter what version I use, even after unlock bootloader. I have also try descibed firmware TB3-730X_S033_160707_ROW but this one cannot be flashed in fastboot mode. It says wrong binary (all files have in name _signed so probably different structure). It's seems that Polish Tab3 tb3-730X tablets are better protected than Russian.
0xAF can You post link to FlashTool what you used to flash your tablet?

[EDIT]
This time i get it working 0xAF are you mean first screen when TWRP start and there is swipe button? I Always swipe and this killed system partition I think. Btw do you both can flash this tablet with FlashTool?

When you start the TWRP for the first time, it will ask to do something on system partition. I cannot remember if it was "Yes/No" answer, or a swipe. Just don't let TWRP touch the system partition.

After unlocking the bootloader with fastboot, you can flash the recovery with fastboot if you want, but first try to boot it, as described in the first post.

If you're going to flash the original firmware from the links above, then you will need SPFlash Tool, because the images (dumps) are made with SPFlash Tool and you cannot directly flash them with fastboot.

For bootloader unlocking, you can try this command: "fastboot oem unlock", while you're in the bootloader.
Did you enabled the "OEM Unlocking" from the "Developer Options" menu?
On my device, I was able to unlock it (after enabling "OEM Unlocking" option) with "fastboot flashing unlock".
4th October 2016, 02:43 PM |#7  
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"I have also try descibed firmware TB3-730X_S033_160707_ROW but this one cannot be flashed in fastboot mode. "
not to flash, always ends with an error 0x7D4 .....
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4th October 2016, 03:46 PM |#8  
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Quote:
Originally Posted by beldy

"I have also try descibed firmware TB3-730X_S033_160707_ROW but this one cannot be flashed in fastboot mode. "
not to flash, always ends with an error 0x7D4 .....

Is your bootloader unlocked?
see the "fastboot" command manual, to check if it is unlocked.
5th October 2016, 01:03 AM |#9  
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Quote:
Originally Posted by 0xAF

When you start the TWRP for the first time, it will ask to do something on system partition. I cannot remember if it was "Yes/No" answer, or a swipe. Just don't let TWRP touch the system partition.

After unlocking the bootloader with fastboot, you can flash the recovery with fastboot if you want, but first try to boot it, as described in the first post.

If you're going to flash the original firmware from the links above, then you will need SPFlash Tool, because the images (dumps) are made with SPFlash Tool and you cannot directly flash them with fastboot.

For bootloader unlocking, you can try this command: "fastboot oem unlock", while you're in the bootloader.
Did you enabled the "OEM Unlocking" from the "Developer Options" menu?
On my device, I was able to unlock it (after enabling "OEM Unlocking" option) with "fastboot flashing unlock".

Thanks. Now all working I just swipe button thinking that is locking button.
About flashing problem. I cannot flash with FlashTool because I have 0x7D4 error, same as beldy. I have try different cables, 3 computer, Windows 7, Windows 8 and Windows 10 - same.
I have unlocked bootloader with "fastboot oem unlock". Without it TWRP cannot be installer or booted. Before I enabled "OEM Unlocking" from the "Developer Options" menu. After it, phone format byself but still cannot flash.
I killed pcs one and send to service. Tablet cannot go into recovery. When it back I see some scratches on cover, like was opened. Maybe they used TestPoint to fix it.
6th October 2016, 05:20 PM |#10  
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Quote:
Originally Posted by DonKapselo

Thanks. Now all working I just swipe button thinking that is locking button.
About flashing problem. I cannot flash with FlashTool because I have 0x7D4 error, same as beldy. I have try different cables, 3 computer, Windows 7, Windows 8 and Windows 10 - same.
I have unlocked bootloader with "fastboot oem unlock". Without it TWRP cannot be installer or booted. Before I enabled "OEM Unlocking" from the "Developer Options" menu. After it, phone format byself but still cannot flash.
I killed pcs one and send to service. Tablet cannot go into recovery. When it back I see some scratches on cover, like was opened. Maybe they used TestPoint to fix it.

I'm glad you've solved the problem. I dont know what is 0x7D4 error. It could be some sort of extra locking of the device, but I doubt it. It's more likely to be something related to SPFlash Tools. It could be also a broken firmware, I haven't tried to flash the firmware from the links I've provided. I only used the Original Firmware to extract the original recovery from there. I needed the original kernel from the recovery to be able to start the TWRP.
A fast look in google gives this:
Quote:

Error 0×7D4
Message: BROM ERROR: S_BROM_DOWNLOAD_DA_FAIL
Meaning: SP Flash tool encountered an error writing to the phone
Solution
* Try using a different USB cord, PC port and PC
* Use the latest version of SP flash tool
* Ensure the battery is well charged and the phone's USB port isn't faulty

But I guess it's not very helpful.
7th October 2016, 12:40 AM |#11  
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Quote:
Originally Posted by 0xAF

I'm glad you've solved the problem. I dont know what is 0x7D4 error. It could be some sort of extra locking of the device, but I doubt it. It's more likely to be something related to SPFlash Tools. It could be also a broken firmware, I haven't tried to flash the firmware from the links I've provided. I only used the Original Firmware to extract the original recovery from there. I needed the original kernel from the recovery to be able to start the TWRP.
A fast look in google gives this:

But I guess it's not very helpful.

Just try to read flash, it's safe. I can bet You will get error 0x7D4 or 2004 (depend of version of flashtool). It's extra locked for sure. Btw. why You need original recovery to start TWRP? Maybe You mean that You need it to compile TWRP for this tablet model?
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